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Reserves for Closed Properties and Property Plant and Equipment Related Impairment Charges (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 12 Months Ended
Feb. 25, 2012
Feb. 26, 2011
Feb. 27, 2010
Feb. 25, 2012
Feb. 26, 2011
Feb. 27, 2010
Changes in the Company's reserves            
Additions       $ 6 $ 73 $ 13
Payments       (56) (40) (48)
Adjustments       13 17 (4)
Beginning balance       178 128 167
Ending balance 141 178 128 141 178 128
Reserves for Closed Properties and Property Plant and Equipment Related Impairment Charges (Textual) [Abstract]            
Property, plant and equipment-related impairment charges $ 1 $ 24 $ 43 $ 10 $ 39 $ 52